Variometer



Aug. 18, 1925.

R. S. COPP VARIOMETER Filed Oct. 19, 1922 ROYSH/VLL YCOPP.

Patented Aug. 18, 1925.

UNlTED STATES PATENT ROY STANLEY GOPP, OF DAYTON, OHIO, ASSIGNOR TO THE A. C. ELECTRICAL MANU- FACTURING 00., OF DAYTON, OHIO, A CQRPORATION OF OHIO.

VARIOMETER.

Application filed October 19, 1922.

To all whom it may concern:

Be it known that I, Roy STANLEY tlorr, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Variometers, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a variometer, such as is used in connection with radio apparatus.

One object of the invention is to provide device of this kind with simple, efficient means for supporting it in various positions, as from a panel, or on a base.

A further object of the invention is to provide a unitary structure of this kind embodying two or more separate tuning devices.

A further object of the invention is to provide such a device which will be simple in its construction and operation and which can be produced at a relatively low cost.

()ther objects of the invention will appear as the device is described in detail.

In the accompanying drawings Fig. 1 is a side elevation of a variometer embodying .my invention, showing the same mounted upon a panel; Fig. 2 is a plan view of the variometer; Fig. 3 is a sectional view taken on the line 33 of Fig. 1; Fig. a is a section taken on the line a4. of Fig. 1; Fig. 5 is a detail view of the stop; Fig. 6 is a de tail view of one of the bearing blocks; and Fig. 7 is a detail view of a spacing block.

In these drawings I have illustrated one embodiment of my invention and have shown the same as applied to a variometer, the main features of constructionof which are well known. It will be understood, however, that this particular embodiment of the invention has been chosen for the purposes of illustration only and that it may take various forms without departing from the spirit thereof.

In that form here shown the variometer comprises an outer shell, or stator, consist Serial No. 595,495.

ing arranged in opposed relation and adapted to receive bolts 5, or other suitable devices, for securing the two sections one to the other. Preferably, blocks 6, 7 and 8 are interposed between the respective lugs, 2, 3 and et, and in the device here shown the blocks constitute spacing devices. The blocks 6 and S at the front and rear sides of the device also comprise bearing blocks and to this end are provided with openings 9 and 10 to receive shafts 11 and 12, which are rotatably mounted in the respective bearings and extend into the shell where they support the inner rotary member, or rotor, of the variometer, which is shown at 13. This rotor may also be formed in two parts, as shown in Fig. 4; and the abutting edges of the sections glued one to the other. I prefer to provide these abutting edges with shallow grooves l l to permit of the expansion of the glue. If desired, the con nection may be strengthened by dowel pins 15. Both the rotor and the shell, or stator, are preferably formed from bakelite, or similar material, so that they may be molded and assembled at a low cost, and by molding the rotor in two sections, or halves, it is possible to make the same much lighter than would be the case if it were molded in one piece. The shafts 11 and 12 may be secured to the rotor in any suitable manner. As here shown they extend through openings in the respective side walls of the rotor and are provided with nuts 26 for retaining the rotor thereon. To make the connection positive I have, in the present instance, shown the rotor as provided at each side, about the opening which receives the shaft with a boss 27 having a beveled outer edge adapted to engage a beveled, or undercut, shoulder 28 formed on the shaft. When the nut 26 is tightened down these beveled surfaces are drawn together with a wedging action and a very tight, firm connection is: established between the shaft and the rotor. The two parts 1 of the shell are each provided on their interior surfaces with coils, or windings 16, while the two parts of the rotor are provided on their Xterior surfaces with coils or windings 17. The coils on the rotor are arranged close to the coils on the shell but are spaced from them a sutlicient distance to permit of the rotation of the rotor. This rotation may be imparted to the rotor in any suitable manner, but in the present instance the shaft 11 at the front of the device extends some distance beyond the shell and is provided with a knob 18 and may also, it desired, have mounted thereon an indicat ing device which will indicate to the operator the position of the rotor. The shaft 12 at the rear of the device has secured thereto a stop 20 which cooperates with a pin 21 secured to the rear bearing block 8 to check the movement thereof at the end of a half rotation in either direction. The coils may be connected into the respective circuits in the usual, or any suitable manner.

Devices oil this kind are mounted in difi erent positions in relation to the apparatus with which they are used, but usiuill the are either mounted on a vertical panel or on a horizontal. base. To provide niountiny of the device in either out these positions l have provided it with. a plurality of si pporting devices. is here shown the bearing blocks 6 and 7, at the front and side of the sl ell are provided with portions which e: and the outer su t ifi'acos or the l supports therefor a d are ac and to he idl secure or a base. is shown in Fig. l ing portions of t by means of screws panel spacing block 4t the rez r vided with supportiinjg members should this seem desirable.

In the present construction I have she an the two portions of the shell as provided each with an oztcnsion 29 extending lengthwise thereof and adapted to support another coil, as shown at 25. The coil may be mounted on each extensi n or on one extension only and in this way if embody in a single unit a complete tuning device for a radio apparatus, tl e coils being adapted to be connected with the antenna for tuning the same.

ll hile I have shown and des'ribed one embodiment of my invention I wish it to be understood that I do not desire to be limited to the details thereof as various modifications may occur to a person skilled in the art.

Having now fully described my invention w rat I claim as new and desire to secure by Letters Patent is:

1. In a device of the character described, a shell provided with internal windings, a

rotor mounted within said shell and provided with external windings, said shell comprising two parts, each having lugs on a pluality oi sides thereof, the respective lugs on the two parts ottsaid shell being opposed one to the other and spacing blocks arranged between said opposed lugs and having portions forming supports and adapted respectively to be attached to a panel or a base.

In a device of the character described. a shell provided with internal windings, a rotor mounted within said shell and provided vith .vternal windings, said shell coinprising two parts each l aving lugs on a plulltlli'f," of sides thereof, the respective lugs the two parts oi said shell being opposed he other, and blocks arranged hex'd opposed lugs on three sides oi two of 'aid bloclcs having pororining snppoit for said device, and d blocks having bearings for said said provided with internal vindings and bearine's in the opposite sides the 'otor within said shell and infdnd witl': e ierial windings, shafts he YGSZ JGC ClYL, biaring's in said iding through the adjacent sai l rot-or, saiijl rotor hein provided at each side with. a boss having a beveled edge, and said shatts having undercut col lars to engage the beveled of said boss, and means mounted on the respective shafts for drawing said lugs and said collars into wedging contact one with the other.

4-. in a device of the cha 'acter described. a shell comprising two parts, each provided with an internal winding, and spacing blocks interposed between said parts at the front and rear sides thereof and provided with hearing openings, shatt-s journaled in the openings in the respective blocks and each having a collar, a rotor mounted within said shell and provided with external windings, said rotor having openings to receive said shafts and being provided adjacent to said openings with parts cooperating with the collars on the respective shatts to form positive connections between the shafts and the rotor, and means mounted on said shafts for d 'awing said part-s into positive engagement with said collars.

In testimony whereof, I aiiix my signature hereto.

'lOY STANLEY COPP. 

